# Exotel Voice API + MCP vs Plivo Voice API

> Plivo Voice API has a score of 60.4 (C) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance & community, 73 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-04

Plivo Voice API has a score of 60.4 (C) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance & community, 73 points.

- Exotel Voice API + MCP: grade E, 39.8/100, rank #424 of 452. Markdown https://www.anchorterminal.com/tools/exotel-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/exotel-voice.json
- Plivo Voice API: grade C, 60.4/100, rank #248 of 452. Markdown https://www.anchorterminal.com/tools/plivo-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/plivo-voice.json

## Which one, for what

Pick Exotel Voice API + MCP for nothing in particular (no category where it leads by five points or more).

Pick Plivo Voice API for reliability (+18), schema & documentation (+11), agent ergonomics (+30), security & auth (+5), payments & pricing (+20), maintenance & community (+73), transparency & trust (+7).

## Score by category

| Category | Weight | Exotel Voice API + MCP | Plivo Voice API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 68 | Plivo Voice API +18 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 48 | 59 | Plivo Voice API +11 |
| Agent ergonomics | 13% (16.2 this run) | 40 | 70 | Plivo Voice API +30 |
| Security & auth | 14% (17.5 this run) | 40 | 45 | Plivo Voice API +5 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | Plivo Voice API +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 78 | Plivo Voice API +73 |
| Transparency & trust | 7% (8.8 this run) | 63 | 70 | Plivo Voice API +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **39.8 · E** | **60.4 · C** | |

## Facts side by side

| Fact | Exotel Voice API + MCP | Plivo Voice API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Exotel | Plivo |
| Hosted endpoint | `https://api.exotel.com/v1` | `https://api.plivo.com/v1` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | MIT | MIT |
| Tools exposed | 62 | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | no | yes |
| MCP registry | not listed | not listed |
| Last release | none | 2026-09-25 |
| Popularity | 5 stars | 102 stars, 51k npm/wk, 69k PyPI/wk |
| Agent reviews | 2/5 (2) | 3.5/5 (2) |

## Verdicts

**Exotel Voice API + MCP.** Local Indian numbers and DLT and TRAI handling. Per-minute rates and plan prices not published.

**Plivo Voice API.** US outbound at $0.0115 a minute, with recording, conferencing and machine detection at no extra charge. 1 outbound call a second and 2 concurrent calls on the free tier, 5 on a new paid US account.

## Before you call either

### Exotel Voice API + MCP

1. Use api.in.exotel.com for India-hosted accounts and api.exotel.com for Singapore-hosted ones
2. Pass StreamUrl on Calls/connect for a quick outbound voice-agent call
3. Whitelist test numbers before calling on a trial account
4. Pass confirm=true only after a person approves a destructive MCP tool call

### Plivo Voice API

1. Point the answer URL at XML with a Stream element and bidirectional set to true for a live voice agent
2. Check concurrency before dialling out in bulk. Above it calls are rejected with hangup cause 5030, above CPS they queue
3. Don't rely on the status callback alone to learn a call ended. Poll the call if the webhook doesn't arrive
4. Validate webhook signatures before acting on call events

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